Masterpiece Mystery!: Poirot XII: The Big Four

Agatha Christie's brilliant sleuth, Hercule Poirot, is back with a thrilling new case.

Adapted by Mark Gatiss (“Sherlock”), “The Big Four” plunges Poirot into a world of global espionage, set against the backdrop of the impending World War II.

The public is in a panic after the shocking death of a Russian chess grandmaster, and Poirot must navigate international figures and intrigue to identify the culprit, with the help of old friends Captain Hastings, Inspector Japp and Miss Lemon.

Shown from left to right: Pauline Moran as Miss Lemon, Philip Jackson as Inspector Japp, David Suchet as Poirot, and Hugh Fraser as Captain Hastings